收集req和resp的相关更改

backend/ent/runtime/runtime.go

@@ -20,6 +20,7 @@ import (
 	"github.com/Wei-Shaw/sub2api/ent/promocodeusage"
 	"github.com/Wei-Shaw/sub2api/ent/proxy"
 	"github.com/Wei-Shaw/sub2api/ent/redeemcode"
+	"github.com/Wei-Shaw/sub2api/ent/requestcapturelog"
 	"github.com/Wei-Shaw/sub2api/ent/schema"
 	"github.com/Wei-Shaw/sub2api/ent/securitysecret"
 	"github.com/Wei-Shaw/sub2api/ent/setting"
@@ -132,6 +133,10 @@ func init() {
 	apikeyDescUsage7d := apikeyFields[16].Descriptor()
 	// apikey.DefaultUsage7d holds the default value on creation for the usage_7d field.
 	apikey.DefaultUsage7d = apikeyDescUsage7d.Default.(float64)
+	// apikeyDescCaptureRequests is the schema descriptor for capture_requests field.
+	apikeyDescCaptureRequests := apikeyFields[20].Descriptor()
+	// apikey.DefaultCaptureRequests holds the default value on creation for the capture_requests field.
+	apikey.DefaultCaptureRequests = apikeyDescCaptureRequests.Default.(bool)
 	accountMixin := schema.Account{}.Mixin()
 	accountMixinHooks1 := accountMixin[1].Hooks()
 	account.Hooks[0] = accountMixinHooks1[0]
@@ -867,6 +872,32 @@ func init() {
 	redeemcodeDescValidityDays := redeemcodeFields[9].Descriptor()
 	// redeemcode.DefaultValidityDays holds the default value on creation for the validity_days field.
 	redeemcode.DefaultValidityDays = redeemcodeDescValidityDays.Default.(int)
+	requestcapturelogFields := schema.RequestCaptureLog{}.Fields()
+	_ = requestcapturelogFields
+	// requestcapturelogDescRequestID is the schema descriptor for request_id field.
+	requestcapturelogDescRequestID := requestcapturelogFields[2].Descriptor()
+	// requestcapturelog.RequestIDValidator is a validator for the "request_id" field. It is called by the builders before save.
+	requestcapturelog.RequestIDValidator = requestcapturelogDescRequestID.Validators[0].(func(string) error)
+	// requestcapturelogDescPath is the schema descriptor for path field.
+	requestcapturelogDescPath := requestcapturelogFields[3].Descriptor()
+	// requestcapturelog.PathValidator is a validator for the "path" field. It is called by the builders before save.
+	requestcapturelog.PathValidator = requestcapturelogDescPath.Validators[0].(func(string) error)
+	// requestcapturelogDescMethod is the schema descriptor for method field.
+	requestcapturelogDescMethod := requestcapturelogFields[4].Descriptor()
+	// requestcapturelog.MethodValidator is a validator for the "method" field. It is called by the builders before save.
+	requestcapturelog.MethodValidator = requestcapturelogDescMethod.Validators[0].(func(string) error)
+	// requestcapturelogDescIPAddress is the schema descriptor for ip_address field.
+	requestcapturelogDescIPAddress := requestcapturelogFields[5].Descriptor()
+	// requestcapturelog.IPAddressValidator is a validator for the "ip_address" field. It is called by the builders before save.
+	requestcapturelog.IPAddressValidator = requestcapturelogDescIPAddress.Validators[0].(func(string) error)
+	// requestcapturelogDescNfsFilePath is the schema descriptor for nfs_file_path field.
+	requestcapturelogDescNfsFilePath := requestcapturelogFields[8].Descriptor()
+	// requestcapturelog.NfsFilePathValidator is a validator for the "nfs_file_path" field. It is called by the builders before save.
+	requestcapturelog.NfsFilePathValidator = requestcapturelogDescNfsFilePath.Validators[0].(func(string) error)
+	// requestcapturelogDescCreatedAt is the schema descriptor for created_at field.
+	requestcapturelogDescCreatedAt := requestcapturelogFields[9].Descriptor()
+	// requestcapturelog.DefaultCreatedAt holds the default value on creation for the created_at field.
+	requestcapturelog.DefaultCreatedAt = requestcapturelogDescCreatedAt.Default.(func() time.Time)
 	securitysecretMixin := schema.SecuritySecret{}.Mixin()
 	securitysecretMixinFields0 := securitysecretMixin[0].Fields()
 	_ = securitysecretMixinFields0

backend/ent/schema/api_key.go

@@ -115,6 +115,11 @@ func (APIKey) Fields() []ent.Field {
 			Optional().
 			Nillable().
 			Comment("Start time of the current 7d rate limit window"),
+
+		// ========== Request capture ==========
+		field.Bool("capture_requests").
+			Default(false).
+			Comment("是否对该 API Key 的请求体进行存储捕获"),
 	}
 }
 

backend/ent/schema/request_capture_log.go

+package schema
+
+import (
+	"time"
+
+	"entgo.io/ent"
+	"entgo.io/ent/dialect"
+	"entgo.io/ent/dialect/entsql"
+	"entgo.io/ent/schema"
+	"entgo.io/ent/schema/field"
+	"entgo.io/ent/schema/index"
+)
+
+// RequestCaptureLog 记录指定 API Key 的请求体，用于审计和分析。
+// 只追加，不支持更新/删除（同 PaymentAuditLog 模式）。
+type RequestCaptureLog struct {
+	ent.Schema
+}
+
+func (RequestCaptureLog) Annotations() []schema.Annotation {
+	return []schema.Annotation{
+		entsql.Annotation{Table: "request_capture_logs"},
+	}
+}
+
+func (RequestCaptureLog) Fields() []ent.Field {
+	return []ent.Field{
+		field.Int64("api_key_id"),
+		field.Int64("user_id"),
+		field.String("request_id").
+			MaxLen(64).
+			Optional().
+			Nillable(),
+		field.String("path").
+			MaxLen(100).
+			Optional().
+			Nillable(),
+		field.String("method").
+			MaxLen(10).
+			Optional().
+			Nillable(),
+		field.String("ip_address").
+			MaxLen(45).
+			Optional().
+			Nillable(),
+		// request_body 存原始 JSON 文本，不加索引，避免影响查询计划
+		field.Text("request_body").
+			Optional().
+			Nillable(),
+		// response_body 存响应文本（非 streaming 为完整 JSON，streaming 为拼接的 assistant text）
+		field.Text("response_body").
+			Optional().
+			Nillable(),
+		// nfs_file_path NFS 文件路径快照，方便核查
+		field.String("nfs_file_path").
+			MaxLen(500).
+			Optional().
+			Nillable(),
+		field.Time("created_at").
+			Default(time.Now).
+			Immutable().
+			SchemaType(map[string]string{dialect.Postgres: "timestamptz"}),
+	}
+}
+
+func (RequestCaptureLog) Edges() []ent.Edge {
+	return nil
+}
+
+func (RequestCaptureLog) Indexes() []ent.Index {
+	return []ent.Index{
+		index.Fields("api_key_id", "created_at"),
+		index.Fields("user_id"),
+	}
+}

backend/ent/tx.go

@@ -44,6 +44,8 @@ type Tx struct {
 	Proxy *ProxyClient
 	// RedeemCode is the client for interacting with the RedeemCode builders.
 	RedeemCode *RedeemCodeClient
+	// RequestCaptureLog is the client for interacting with the RequestCaptureLog builders.
+	RequestCaptureLog *RequestCaptureLogClient
 	// SecuritySecret is the client for interacting with the SecuritySecret builders.
 	SecuritySecret *SecuritySecretClient
 	// Setting is the client for interacting with the Setting builders.
@@ -212,6 +214,7 @@ func (tx *Tx) init() {
 	tx.PromoCodeUsage = NewPromoCodeUsageClient(tx.config)
 	tx.Proxy = NewProxyClient(tx.config)
 	tx.RedeemCode = NewRedeemCodeClient(tx.config)
+	tx.RequestCaptureLog = NewRequestCaptureLogClient(tx.config)
 	tx.SecuritySecret = NewSecuritySecretClient(tx.config)
 	tx.Setting = NewSettingClient(tx.config)
 	tx.SubscriptionPlan = NewSubscriptionPlanClient(tx.config)

backend/internal/config/config.go

@@ -83,6 +83,16 @@ type Config struct {
 	Gemini                  GeminiConfig                  `mapstructure:"gemini"`
 	Update                  UpdateConfig                  `mapstructure:"update"`
 	Idempotency             IdempotencyConfig             `mapstructure:"idempotency"`
+	RequestCapture          RequestCaptureConfig          `mapstructure:"request_capture"`
+}
+
+// RequestCaptureConfig 配置请求体捕获功能
+type RequestCaptureConfig struct {
+	// NFSPath 为本地挂载的 NFS 根目录（例如 /mnt/nfs/requests）。
+	// 留空则跳过文件写入，只写数据库。
+	NFSPath string `mapstructure:"nfs_path"`
+	// WorkerTimeoutSeconds 单次异步写入的超时时间（秒），默认 5。
+	WorkerTimeoutSeconds int `mapstructure:"worker_timeout_seconds"`
 }
 
 type LogConfig struct {

backend/internal/handler/gateway_handler.go

@@ -45,6 +45,7 @@ type GatewayHandler struct {
 	apiKeyService             *service.APIKeyService
 	usageRecordWorkerPool     *service.UsageRecordWorkerPool
 	errorPassthroughService   *service.ErrorPassthroughService
+	requestCaptureService     *service.RequestCaptureService
 	concurrencyHelper         *ConcurrencyHelper
 	userMsgQueueHelper        *UserMsgQueueHelper
 	maxAccountSwitches        int
@@ -65,6 +66,7 @@ func NewGatewayHandler(
 	apiKeyService *service.APIKeyService,
 	usageRecordWorkerPool *service.UsageRecordWorkerPool,
 	errorPassthroughService *service.ErrorPassthroughService,
+	requestCaptureService *service.RequestCaptureService,
 	userMsgQueueService *service.UserMessageQueueService,
 	cfg *config.Config,
 	settingService *service.SettingService,
@@ -98,6 +100,7 @@ func NewGatewayHandler(
 		apiKeyService:             apiKeyService,
 		usageRecordWorkerPool:     usageRecordWorkerPool,
 		errorPassthroughService:   errorPassthroughService,
+		requestCaptureService:     requestCaptureService,
 		concurrencyHelper:         NewConcurrencyHelper(concurrencyService, SSEPingFormatClaude, pingInterval),
 		userMsgQueueHelper:        umqHelper,
 		maxAccountSwitches:        maxAccountSwitches,
@@ -147,6 +150,20 @@ func (h *GatewayHandler) Messages(c *gin.Context) {
 		return
 	}
 
+	// 捕获请求体（仅当该 API Key 开启了 capture_requests）
+	var captureID int64
+	if apiKey.CaptureRequests && h.requestCaptureService != nil {
+		requestID, _ := c.Request.Context().Value(ctxkey.RequestID).(string)
+		captureID = h.requestCaptureService.Capture(
+			apiKey.ID, subject.UserID,
+			requestID,
+			c.Request.URL.Path,
+			c.Request.Method,
+			c.ClientIP(),
+			body,
+		)
+	}
+
 	setOpsRequestContext(c, "", false, body)
 
 	parsedReq, err := service.ParseGatewayRequest(body, domain.PlatformAnthropic)
@@ -811,6 +828,11 @@ func (h *GatewayHandler) Messages(c *gin.Context) {
 				result.ReasoningEffort = service.NormalizeClaudeOutputEffort(parsedReq.OutputEffort)
 			}
 
+			// 异步写入响应体到捕获记录
+			if captureID > 0 && h.requestCaptureService != nil {
+				h.requestCaptureService.CaptureResponse(captureID, result.ResponseBody)
+			}
+
 			// 使用量记录通过有界 worker 池提交，避免请求热路径创建无界 goroutine。
 			h.submitUsageRecordTask(func(ctx context.Context) {
 				if err := h.gatewayService.RecordUsage(ctx, &service.RecordUsageInput{

backend/internal/repository/api_key_repo.go

@@ -629,9 +629,10 @@ func apiKeyEntityToService(m *dbent.APIKey) *service.APIKey {
 		Usage5h:       m.Usage5h,
 		Usage1d:       m.Usage1d,
 		Usage7d:       m.Usage7d,
-		Window5hStart: m.Window5hStart,
-		Window1dStart: m.Window1dStart,
-		Window7dStart: m.Window7dStart,
+		Window5hStart:   m.Window5hStart,
+		Window1dStart:   m.Window1dStart,
+		Window7dStart:   m.Window7dStart,
+		CaptureRequests: m.CaptureRequests,
 	}
 	if m.Edges.User != nil {
 		out.User = userEntityToService(m.Edges.User)